Magneto-starter pawl-tripping device



Feb. 5, 1929.

1,701,119 L. J. M. PETERSON MAGNETO STARTER PAWL TRIPPING DEVICE Filed April 26, 1927 2 Sheets-Sheet 1 [12 ventor 14 ttornqy Feb. 5, 1929. 1,701,119

L. J. M. PETERSON MAGNETO STARTER PAWL TRIPPING DEVICE Filed April 26, 1927 2 Shuts-Sheet 2 I 71 *uentor Patented Feb. 5, 1929.

1 m ns) PATENT OFFICE.

LEWELL J. M. PETERSON, OF NEWARK, ILLINOIS.

MAGNETO-STARTER PAWL-TRIPPING DEVICE.

Application filed April 26, 1927.

The present invention relates to a novel and simple means for tripping the plunger which actuates the starter pawl of a magneto which is used upon tractors.

One of the important objects of the present invention is to provide a starter pawl tripping device which is remotely operable, thus obviating the necessity of having to lift up the hood of the tractor and manually actuate the plunger associated with the impulse starter pawl of a magneto.

At the present time, considerable time and labor is lost whenever it becomes necessary to trip the plunger which is operatively associated with the starter pawl of a magneto on a tractor, and the present invention has for its principal object to provide a simple and efficient means for positively tripping the plunger by merely pulling a wire which forms a part of the tripping mechanism and which wire exten ds outwardly through the hood of the tractor so that the same is at all times readily accessible.

A further object is to provide a device of the above mentioned character which may be readily and easily attached to a magneto with out necessitating any material alterations of the parts with which the same is associated.

A further object is to provide a tripping device of the above mentioned character which is simple in construction inexpensive, strong. and durable and further well adapted to the purpose for which it is designed.

Other objects and advantages of the invention will become apparentfrom the following description taken in connection with the accompanying drawings.

In. the accompanying part of this application:

Figure 1 a fragmentary perspective vi cw of a front portion of the tractor showing the outwardly projecting end of the pull wire forming a part of the tripping device embodying my invention.

Fi ure 2 is a front elevation of the tripping mounted on a magneto.

.. ure 3 is a top plan view thereof.

Figure 41 is a side elevation, the pull wire extending through the side of the hood of the tractor.

Figure 5 is a detail perspective view of the trip lever.

Fi urc drawings forming Serial No. 186,711.

Figure 7 is a detail perspective View of the plunger tripping arm.

In the drawings wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates a magneto used on tractors and in the present instance. the magneto is of the Splitdorf type. The impulse starter forming a partof the magneto is designated generally by the numeral 2 and adapted for cooperation with the notch 3 formed in the outer peripheral edge of the rotatable member l of the impulse starter is the pawl 5. This pawl is supported on the bracket 6 which is in the form of a plate and is secured on the side of the magneto and operatively associated with the pawl for actuating the same is the vertically extending plunger 7., the same extending through the apertured lug 7 formed on the outer face of the bracket 6 at the upper edge portion thereof.

The parts thus far described are of the con ventional construction and at the present time, it is necessary to lift up the hood A, of the tractor in order to obtain access to the upper end of the plunger 7 so that said plungmay be tripped whereby to move the pawl 5 into locking engagement with the notch 8 for the purpose well known in the art.

This entails the expenditure of considerable time and labor and frequently it is often ditlicult to reach this plunger for tripping the pawl. The present invent-ion has therefore been devised for the purpose of facilitating the tripping of the plunger at a point remote from the plunger.

ll ly improved tripping device comprises a curved tripping arm 8, the curved end of which i s slightly bent upwardly as is clearly shown in Figures 2, 4. and 7 of the drawings. The inner end of this tripping arm is enll ed as illustrated at 9 and a central opening 10 is formed in this enlarged portion. A series of slots are also formed in the central portion of the enlarged inner end 9 of the tripping arm 8 as indicated at 11 with refercncc more particularly to Figure 7 of the drawing.

The enlarged inner portion 9 of this tripping arm is adapted for disposition on the apertured lug 19 formed on the outer face of the bracket or plate 6 at the upper edge thereof adapted for cooperation with the pping arm 8 is the trip lever 13 the inner end thereof being enlarged as indicated at 14-, and the enlarged inner end is formed with a central opening which registers with the central opening 10 and the enlarged inner end portion 1 1 of the trip lever 13 is disposed on top of the enlarged inner end 9 of the tripping arm 8 and bolt 16 extends through the registering openings in the trip ping arm and lever 8 and 13, respectively, well as through the apertured lug 12 formed on the outer face of the upper portion of the stationary bracket or plate 6.

A series of radially disposed tongues l? depend downwardly "from the outer edge of the enlarged inner end 14: of the trip lever 13 and these tongues engage in the respective slots 11 provided thereior in the enlarged inner end portion 9 of the tripping arm 8 so that a rigid connection between the trip lever'and the arm will be provided thus permitting the two elements to operate simultaneously.

Themeans for actuating the trip lever and the tripping arm comprises an elongated pull rod designated by the numeral 18. The inner end thereof is bent downwardly for disposition within the suitable opening 19 provided therefor inthe outer end of the trip lever 13 asis clearly shown in Figure 4:. This pull wire extends laterally with respect to the trip lever 13 and is slidable through a suitable opening l5 provided therefor in the side ofthe hood A and the outer end of this pull rod terminates in a loop or eye 20, provides a handle whereby said rod may be easily grasped tor actuating the same.

Also forming an impor ant part of the present invention is the bracket 21 which is in the form of a flat arm, the same tapering gradually toward its outer end. The inner end of this arm is'ttormed with an opening 22 which is adapted for registry with the opening in the apertured lug 12 and this arm is disposed below the lug, and the bolt 16 entends therethrough in the manner as clearly shown in Figures 2 and 4 of the drawiirs. The arm or bracket 21 also extends laterally with respect to the trip lever and the tripping arm and for the purpose of preventing the movement of the bracket 21 in a horizontal plane, the inner end of the arm or bracket is cut away to provide the finger 23, andv the same extends through a suitable opening 24 provided therefor in the plate or bracket 6.

A contractile coil spring 25 is secured. at one end to the upwardly bent free end of the tripping arm 8, said end of the tripping arm being provided with an opening 26 to accommodate one end of the spring 25. The other end of this spring is secured to the outer end of the stationary bracket 21 in a suitable opening 27 provided therefor and this is clearly shown in Figure 3 of the drawings.

The contractile coil spring 25 normally holds the tripping arm 8 out of engagement with. the upwardly projecting end of the plunger 7.

The operation of my improved tripping device may be briefly stated as follows: Normally the parts are arranged as shown in Figure 2 of the drawings and the pawl 5 is out of engagement with the notch 3 formed in the rotating member 4- of the impulse starteri l. T he handle is grasped and is pulled outwardly and this will result in the interconnected tripping arm and trip lever to swing on the pivot provided by the bolt 16 so that the curved convex edge of the tripping arm will be brought into engagement with the upwardly projecting end of the plunger 7 whereby to trip the plunger so that the pawl 5 will be moved into position for engagement with the notch 3, thus permitting of the locking of the rotatable member 4: against'turther rotation until it comes to a certain tripping point within the impulse starter where at this point the impulse starter trips, thus sending a hot spark at the proper time through the wires and the spark plugs of the internal combustion engine of the tractor whereby to facilitate the quick and easy starting of the motor, and to further prevent back firing.

"3, As soon as the handle 20 is released, the contractile coil spring will automatically returnthe movableparts of the tripping device to their normal positions shown in Figure 2.

It will thus be seen from the foregoing description, that I have provided a simple and efiicient device for tripping the plunger which controls the starter pawl of a magneto, the device being at all times positive and eli'i cient in its operation, and furthermore saving considerable time and labor in actuating the tripping of the pawl. Also the simplicity of my device enables the same to be readily and easily associated with a magneto without necessitating any material alteration of the parts of the magneto with which the tripping device is associated.

l/Vhile I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit or" the invention and the scope of the appended claims:

Having thus, described the invention, what I claim is 1. In a magneto starter pawl trip, wherein a plunger is operatively associated with the starter pawl for actuating the same, of aitripping arm pivotally mounted at one end on the magneto and normally out of engagement with the plunger, an adjustable lever rigidly attached to the pivoted end of the tripping arm, a pull rod connected to the outer end of the lever for actuating the same at a remote point, and means for normally holding the tripping arm out of engagement with the plunger, the plunger adapted to he tripped when the pull rod is actuated and the tripping arm is moved into engagement with the plunger.

2 In a magneto for trips wherein a plnnger is operatively associated with the starter pawl for actuating the same of a tripping arm pivotally mounted at one end on the magneto normally out of engagement with the plunger, said arm being formed with apertures at its pivotal end, a lever adjustably attached to the tripping arm, said lever being LEVVELL J. M. PETERSON. 

